We here actually unscrew the electric solenoid and hook a air line straight up to it a lot more air equals more sound so its actually a lot louder with this valve than what the box says. Chromed Brass Trumpets with Stainless Steel Brackets.18" long x 13-1/2" wide x 13-3/4 high. Operating range from 70 PSI to 140 PSI and up. Heavy duty chrome train horn with true train horn sound at 140+ decibels 7 floor mount stand specially designed for the grand general train horn. Grand General's heavy duty train horn is uniquely made with a high quality material. This allows for a true train horn sound not offered by anyone else. The trumpets are then topped with a show quality triple chrome finish and packaged with a heavy duty stainless steel "L" bracket and solenoid. We here strive for the best customer service so if any questions just ask.. The item "Train truck air horn and 7 valve set chromed brass universal new semi truck" is in sale since Monday, November 4, 2019. This item is in the category "eBay Motors\Parts & Accessories\Commercial Truck Parts\Exterior, Body & Frame\Horns". The seller is "kyrelrissle_0" and is located in California, Missouri. This item can be shipped worldwide.